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4-Amino-2,2,5,5-tetrakis(trifluoromethyl)-3-oxazoline (3a) was prepared from the reaction of sodium cyanide with hexafluoroacetone and hexafluoroacetone imine, and from the reaction of hexafluoroacetone cyanohydrin with the imine. Several other oxazolines were also prepared by related reactions of other fluoroketones and imines. The proton nmr spectrum of an 15N-labeled sample of 3a shows that it exists in solution primarily as the amino tautomer and not as the imino tautomer 3b. Comparison of 3a with the closely related, pharmacologically active 4-amino-2,2,5,5-tetrakis(trifluoromethyl)-3-imidazoline (2) has shown large differences in ΔH of complex formation and reactivity with electrophilic reagents.

Perfluorocyclopropene undergoes free-radical copolymerization with ethylene, isobutylene, cis- and trans-2-butene, vinyl acetate, methyl vinyl ether, vinyl chloride, styrene, acrylonitrile, tetrafluoroethylene, vinyl fluoride, and vinylidene fluoride. The copolymerization proceeds most readily with electron-rich olefins such as methyl vinyl ether (to yield a 1:1 copolymer), but conditions were found to give copolymers with electron-deficient olefins such as tetrafluoroethylene and vinylidene fluoride. Copolymers with methyl vinyl ether, tetrafluoroethylene, vinyl fluoride, and vinylidene fluoride were examined in detail. Evidence is presented that the perfluorocycloproply ring is incorporated intact into the copolymer and can be subsequently isomerized to a perfluoropropenyl unit by heating at 200–300°C.

Bis-trifluormethyl-keten (I) reagiert mit Olefinen (II) zu den Addukten (III) und (IV); letztere gehen z.Tl. in die konjugierten Isomeren (V) uber.

Peroxydisulfuryldifluorid (IV) reagiert mit 1-Hydroheptafluorpropan (III) bei 40-50°C in 72%iger Ausbeute zu 1-Fluorsulfatoheptafluorpropan (II) und unter analogen Bedingungen mit w-Hydrododecafluoronanthsaurenitril (V) in 22%iger Ausbeute zu w-Fluorsulfatododecafluoronanthsaurenitril (VI).